Precision bending machine for continuous bending of curved glass cover

Abstract

The present invention discloses a precision hot bending machine for continuous hot bending of curved glass cover plates. The conveyor belt is driven by a first servo motor installed on the side of a bracket. The first robot arm is used to place a lower mold on the conveyor belt and place the glass cover plate raw material on the corresponding lower mold. The PLC controller controls the piston rod of the cylinder to extend so that the baffle is used to block the transmission of the lower mold; the PLC controller controls the hydraulic cylinder on the top of the hot bending box to control the lowering of the upper mold; the CDD industrial camera is used to detect the position of the lower mold, and improve the loading efficiency of the glass cover plate raw material and the unloading efficiency after hot bending forming; through the setting of the CDD industrial camera, the position of the lower mold can be accurately located, thereby driving the upper mold to move to just above the lower mold, which is conducive to the next step of realizing precise mold closing of the upper and lower molds; the preset holding time ensures the holding time of the upper mold on the lower mold, which is conducive to ensuring the quality of hot bending forming of the glass cover plate raw material.

Description

Technical Field

[0001] The present invention relates to the technical field of curved glass cover plate bending machines, and in particular to a precision bending machine for continuous bending of curved glass cover plates. Background Art

[0002] During the production of automotive curved glass cover plates, they need to be hot-bent into curved glass cover plates with different curvatures so that they can be accurately installed on the corresponding equipment. For example, the Chinese patent with announcement number CN205011624U discloses a hot bending device for glass processing, including a conveying mechanism, a heating room, a hot bending room, an annealing transition room and an annealing room. The heating room is located between the conveying mechanism and the hot bending room, and the annealing transition room is located between the hot bending room and the annealing room. The conveying mechanism includes a conveying device and a conveying auxiliary frame. The running device includes a running frame, a horizontal running track, a vertical running track and a motor. The running frame is mounted on the horizontal running track. The horizontal running track passes through the hot bending room, the annealing transition room and the annealing room. The vertical running track is connected to the hot bending axis, and the hot bending axis runs along the direction of the vertical running track.

[0003] However, the above solution has the following shortcomings: it bends the glass by cooperating with the hot bending shaft and the deforming roller, which makes it impossible to maintain pressure on the glass for a certain period of time when bending, and it is impossible to control the pressure of the hot bending shaft and the deforming roller on the glass when bending. This will reduce the quality of glass hot pressing. For this reason, we have launched a precision hot bending machine for continuous hot bending of curved glass cover plates. Summary of the Invention

[0004] The object of the present invention is to provide a precision bending machine for continuous bending of curved glass cover plates, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a precision hot bending machine for continuous hot bending of curved glass cover plates, comprising a bracket for mounting a conveyor belt, a first robot arm being provided at a loading end of the bracket, the conveyor belt being driven by a first servo motor mounted on a side of the bracket, the first robot arm being used to place a lower mold on the conveyor belt, and a glass cover plate raw material being placed on a corresponding lower mold, the conveyor belt being used to transport the lower mold;

[0006] A heat bending box is provided at the upper end of the middle portion of the bracket. A temperature sensor for detecting incoming glass cover plate raw materials is provided at the inner right end of the heat bending box. A baffle driven by a cylinder is movably installed on the side of the bottom of the heat bending box. When the temperature sensor detects incoming glass cover plate raw materials, the piston rod of the cylinder is controlled by a PLC controller to extend, so that the baffle is perpendicular to the conveyor belt, thereby blocking the conveyance of the lower mold.

[0007] Two sets of outward-opening inclined plates are provided on the right side of the baffle. A positioning groove is provided in the middle of the right side of the baffle. A switch is provided in the positioning groove. A positioning block for inserting into the positioning groove is provided in the middle of the left side of the lower mold. After the positioning block is inserted into the positioning groove, the switch is touched, so that the PLC controller controls the hydraulic cylinder on the top of the hot bending box to control the lowering of the upper mold.

[0008] The hydraulic piston rod at the bottom of the hydraulic cylinder is connected to a lifting box seat, and the movable seat fixed on the top of the upper mold extends into the lifting box seat, and the movable seat is penetrated by a screw rod in the lifting box seat, and the screw rod is driven by a second servo motor at one end of the lifting box seat;

[0009] A CDD industrial camera is provided on the bottom side of the upper mold to detect the position of the lower mold and control the second servo motor through the PLC controller to drive the upper mold to move to the top of the lower mold.

[0010] The upper end of the lower mold is provided with four sets of positioning seats, and the lower end of the upper mold is provided with positioning protrusions matching the corresponding positioning seats. The upper end of the lower mold is also provided with several sets of pressure detection modules for detecting the pressure of the upper mold;

[0011] The discharging end of the bracket is provided with a second robot arm and a third robot arm for transferring the curved glass cover plate after hot bending to a tray for stationary placement.

[0012] Compared with the prior art, the present invention has the following advantages: the first robot arm can realize the loading of glass cover plate raw materials, and the second and third robots can realize the unloading of curved glass cover plates after hot bending, thereby improving the working efficiency of the entire hot bending process;

[0013] The cylinder drives the baffle to block and release the lower mold. After blocking the lower mold, it is convenient for the next step to close the upper and lower molds.

[0014] The CDD industrial camera can accurately locate the position of the lower mold, thereby driving the upper mold to move directly above the lower mold, which is conducive to the next step of achieving precise mold closing between the upper and lower molds.

[0015] The pressure of the upper mold pressing the lower mold is preset by the PLC controller, so that the hydraulic cylinder continues to work until the pressure detection module detects that the pressure of the upper mold on the lower mold reaches the preset pressure. In this way, the pressure of the upper mold and the lower mold during hot bending can be accurately detected, which is conducive to the hot bending forming of the glass cover plate raw material;

[0016] The timing module presets the pressing time of the upper mold on the lower mold, so that the upper mold can reach the preset holding time under the preset pressure. This ensures the holding time of the upper mold on the lower mold, which is conducive to ensuring the quality of the hot bending forming of the glass cover raw material. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the exploded structure of the connection between the hydraulic cylinder, the lifting box seat and the upper mold of the present invention;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the connection between the cylinder and the baffle of the present invention;

[0020] Figure 4 This is a schematic structural diagram of the present invention when the lower mold moves toward the baffle;

[0021] Figure 5 Schematic diagram of the three-dimensional structure of the lower mold of the present invention;

[0022] Figure 6 This is a schematic diagram of the exploded structure of the connection between the positioning protrusion and the positioning seat of the present invention.

[0023] In the figure: 1. first robot arm; 2. bracket; 3. first servo motor; 4. hydraulic cylinder; 5. hot bending box; 6. baffle; 7. cylinder; 8. second robot arm; 9. conveyor belt; 10. third robot arm; 11. lower mold; 12. control box; 13. hydraulic piston rod; 14. lifting box seat; 15. second servo motor; 16. moving seat; 17. support seat; 18. upper mold; 19. positioning protrusion; 20. support wheel; 21. second pin shaft; 22. first pin shaft; 23. piston rod; 24. connecting seat; 25. inclined plate; 26. third pin shaft; 27. positioning groove; 28. switch; 29. positioning seat; 30. positioning block; 31. positioning inclined groove; 32. pressure detection module; 33. positioning inclined surface. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-6 The present invention provides a technical solution: a precision hot bending machine for continuous hot bending of curved glass cover plates, comprising a bracket 2 for mounting a conveyor belt 9, a first robot arm 1 being provided at a loading end of the bracket 2, and the conveyor belt 9 being driven by a first servo motor 3 mounted on the side of the bracket 2;

[0026] The output end of the first servo motor 3 is connected to a drive shaft inside the conveyor belt 9. A gear is mounted on the drive shaft and meshes with teeth on the inner surface of the conveyor belt 9. A driven shaft is installed at the other end of the conveyor belt 9. The ends of the driven shaft and the drive shaft extend into bearings on the sides of the bracket 2.

[0027] The first robot 1 is used to place the lower mold 11 on the conveyor belt 9, and place the glass cover plate raw material on the corresponding lower mold 11. The conveyor belt 9 is used to transport the lower mold 11;

[0028] A heat bending box 5 is provided at the upper middle end of the bracket 2. A temperature sensor for detecting the incoming glass cover plate raw material is provided at the right inner end of the heat bending box 5. A baffle 6 driven by a cylinder 7 is movably installed on the side of the bottom of the heat bending box 5.

[0029] A slot is provided on the bottom side of the heat bending box 5. The cylinder 7 is movably mounted on the left side of the slot via the first pin 22, and the baffle 6 is movably mounted on the right side of the slot via the second pin 21. The piston rod 23 at the output end of the cylinder 7 is movably connected to the connecting seat 24 on the side of the baffle 6 via the third pin 26.

[0030] When the temperature sensor detects the incoming glass cover plate raw material, the PLC controller controls the piston rod 23 of the cylinder 7 to extend, so that the baffle 6 is perpendicular to the conveyor belt 9, which is used to block the conveyance of the lower mold 11;

[0031] Two groups of outwardly opening inclined plates 25 are provided on the right side of the baffle 6. A positioning groove 27 is provided in the middle of the right side of the baffle 6. A switch 28 is provided in the positioning groove 27. A positioning block 30 for inserting into the positioning groove 27 is provided in the middle of the left side of the lower mold 11. After the positioning block 30 is inserted into the positioning groove 27, it touches the switch 28, so that the PLC controller controls the hydraulic cylinder 4 on the top of the hot bending box 5 to control the upper mold 18 to descend.

[0032] The hydraulic piston rod 13 at the bottom of the hydraulic cylinder 4 is connected to the lifting box seat 14. The movable seat 16 fixed on the top of the upper mold 18 extends into the lifting box seat 14. The movable seat 16 is penetrated by a screw in the lifting box seat 14. The screw is driven by a second servo motor 15 at one end of the lifting box seat 14.

[0033] A CDD industrial camera is provided on the bottom side of the upper mold 18 to detect the position of the lower mold 11 and control the second servo motor 15 through the PLC controller to drive the upper mold 18 to move to the top of the lower mold 11.

[0034] The upper end of the lower mold 11 is provided with four sets of positioning seats 29, and the lower end of the upper mold 18 is provided with positioning protrusions 19 that match the corresponding positioning seats 29. The upper end of the lower mold 11 is also provided with several sets of pressure detection modules 32 for detecting the pressure of the upper mold 18;

[0035] The discharge end of the support 2 is equipped with a second robot 8 and a third robot 10, which are used to transfer the curved glass cover sheets after heat bending to a tray for static placement. The PLC controller is installed in a control box 12 on the side of the support 2. The control box 12 also contains a timing module, which is used to maintain pressure after the upper mold 18 and the lower mold 11 are closed according to the time preset by the timing module.

[0036] Specifically, when in use, the PLC controller controls the first robot arm 1 to operate, so that the first robot arm 1 places the lower mold 11 on the conveyor belt 9, and then the first robot arm 1 places the heated glass cover plate raw material on the lower mold 11, and then the first servo motor 3 operates, so that the conveyor belt 9 conveys the lower mold 11 to the left;

[0037] Since the heated glass cover plate raw material is hot, the temperature sensor senses the incoming glass cover plate raw material and controls the piston rod 23 of the cylinder 7 to extend through the PLC controller, so that the baffle 6 is perpendicular to the conveyor belt 9 until the lower mold 11 is transferred to the baffle 6 and blocks the transfer of the lower mold 11;

[0038] Since two sets of outwardly opening inclined plates 25 are provided on the right side of the baffle 6, the lower mold 11 can be smoothly moved between the two sets of inclined plates 25, so that the positioning block 30 in the middle of the left side of the lower mold 11 can be accurately inserted into the positioning groove 27;

[0039] After the positioning block 30 is inserted into the positioning groove 27, the switch 28 is touched, causing the PLC controller to control the hydraulic cylinder 4 on the top of the hot bending box 5 to work, so that the hydraulic piston rod 13 is extended, driving the lifting box seat 14 and the upper mold 18 to descend. During this process, the CDD industrial camera detects the position of the lower mold 11, and then controls the second servo motor 15 through the PLC controller to drive the upper mold 18 to move to the top of the lower mold 11. At this time, the upper mold 18 continues to descend until the upper mold 18 and the lower mold 11 are completely closed.

[0040] Due to the arrangement of the positioning seat 29 and the positioning protrusion 19, a positioning bevel groove 31 is provided inside the positioning seat 29, and a positioning bevel surface 33 matching the positioning bevel groove 31 is provided on the outside of the positioning protrusion 19. During the mold closing process of the upper mold 18 and the lower mold 11, the positioning protrusion 19 is first inserted into the positioning bevel groove 31 of the positioning seat 29 until the positioning bevel surface 33 on the outside of the positioning protrusion 19 is completely matched with the positioning bevel groove 31, thus completing the precise mold closing of the upper mold 18 and the lower mold 11.

[0041] At this time, the pressure of the upper mold 18 pressing the lower mold 11 is preset by the PLC controller, so that the hydraulic cylinder 4 continues to work until the pressure detection module 32 detects that the pressure of the upper mold 18 on the lower mold 11 reaches the preset pressure;

[0042] Since support seats 17 are provided on both sides of the top of the upper mold 18, support wheels 20 are movably connected in the support seats 17, and the support wheels 20 are in close contact with the bottom of the lifting box seat 14, this ensures that the upper mold 18 is firmly supported on the bottom of the lifting box seat 14, and when the upper mold 18 presses down the lower mold 11, the upper mold 18 will not cause damage to the screw rod in the lifting box seat 14;

[0043] At the same time, the timing module presets the pressing time of the upper mold 18 on the lower mold 11, so that the upper mold 18 presses the lower mold 11 under the preset pressure for the preset holding time, and then the hydraulic piston rod 13 of the hydraulic cylinder 4 drives the lifting box seat 14 and the upper mold 18 to move upward, so that the upper mold 18 is separated from the lower mold 11;

[0044] Then, the piston rod 23 of the cylinder 7 retracts quickly, causing the baffle 6 to move to the inside of the heat bending box 5. At this time, the lower mold 11 and the heat-bent curved glass cover plate move to the left under the action of the conveyor belt 9 until they move to the unloading end of the conveyor belt 9. Then the second robot 8 and the third robot 10 work to transfer the heat-bent curved glass cover plate to the tray for stationary placement.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A precision bending machine for continuous bending of curved glass cover plates, comprising a bracket (2) for mounting a conveyor belt (9), characterized in that: A first robot (1) is provided at the loading end of the support (2), and a conveyor belt (9) is driven by a first servo motor (3) installed on the side of the support (2). The first robot (1) is used to place the lower mold (11) on the conveyor belt (9) and place the glass cover plate raw material on the corresponding lower mold (11). The conveyor belt (9) is used to transport the lower mold (11); A heat bending box (5) is provided at the upper middle end of the bracket (2), and a temperature sensor for detecting the incoming glass cover plate raw material is provided at the inner right end of the heat bending box (5). A baffle (6) driven by a cylinder (7) is movably installed on the side of the bottom of the heat bending box (5). When the temperature sensor detects the incoming glass cover plate raw material, the piston rod (23) of the cylinder (7) is controlled by the PLC controller to extend, so that the baffle (6) is in a state perpendicular to the conveyor belt (9) to block the transmission of the lower mold (11); Two groups of outwardly opening inclined plates (25) are provided on the right side of the baffle (6); a positioning groove (27) is provided in the middle of the right side of the baffle (6); a switch (28) is provided in the positioning groove (27); a positioning block (30) for inserting into the positioning groove (27) is provided in the middle of the left side of the lower mold (11); after the positioning block (30) is inserted into the positioning groove (27), it touches the switch (28), so that the PLC controller controls the hydraulic cylinder (4) on the top of the hot bending box (5) to control the upper mold (18) to descend; The hydraulic piston rod (13) at the bottom of the hydraulic cylinder (4) is connected to a lifting box seat (14), and the movable seat (16) fixed on the top of the upper mold (18) extends into the lifting box seat (14), and the movable seat (16) passes through the lifting box seat (14) through the screw rod in the lifting box seat (14), and the screw rod is driven by a second servo motor (15) at one end of the lifting box seat (14); A CDD industrial camera is provided on the bottom side of the upper mold (18) for detecting the position of the lower mold (11) and controlling the second servo motor (15) to work through a PLC controller to drive the upper mold (18) to move to just above the lower mold (11); The upper end of the lower mold (11) is provided with four groups of positioning seats (29), and the lower end of the upper mold (18) is provided with positioning protrusions (19) matching the corresponding positioning seats (29). The upper end of the lower mold (11) is also provided with several groups of pressure detection modules (32) for detecting the pressure of the upper mold (18); The discharge end of the support (2) is provided with a second robot arm (8) and a third robot arm (10), which are used to transfer the curved glass cover plate after heat bending to a tray for stationary placement.

2. The precision bending machine for continuous bending of curved glass cover plates according to claim 1, characterized in that: The output end of the first servo motor (3) is connected to a driving shaft inside the conveyor belt (9), a gear is fixedly mounted on the driving shaft, and the gear is engaged with teeth on the inner surface of the conveyor belt (9), and a driven shaft is provided at the other end inside the conveyor belt (9).

3. The precision bending machine for continuous bending of curved glass cover plates according to claim 2, characterized in that: Both ends of the driven shaft and the driving shaft extend into bearings on the sides of the bracket (2) respectively.

4. The precision bending machine for continuous bending of curved glass cover plates according to claim 1, characterized in that: The bottom side of the hot bending box (5) is provided with a slot, the cylinder (7) is movably mounted on the left side of the slot via a first pin (22) thereon, and the baffle (6) is movably mounted on the right side of the slot via a second pin (21) thereon.

5. The precision bending machine for continuous bending of curved glass cover plates according to claim 4, characterized in that: The piston rod (23) at the output end of the cylinder (7) is movably connected to the connecting seat (24) on the side of the baffle (6) through a third pin shaft (26).

6. The precision bending machine for continuous bending of curved glass cover plates according to claim 1, characterized in that: Support seats (17) are provided on both sides of the top of the upper mold (18), and support wheels (20) are movably connected inside the support seats (17), and the support wheels (20) are closely attached to the bottom of the lifting box seat (14).

7. The precision bending machine for continuous bending of curved glass cover plates according to claim 1, characterized in that: The PLC controller is installed in a control box (12) on the side of the bracket (2). A timing module is also provided in the control box (12) for maintaining pressure according to a time preset by the timing module after the upper mold (18) and the lower mold (11) are closed.

8. The precision bending machine for continuous bending of curved glass cover plates according to claim 1, characterized in that: A positioning inclined groove (31) is provided inside the positioning seat (29), and a positioning inclined surface (33) matching the positioning inclined groove (31) is provided on the outside of the positioning protrusion (19).

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